on 2.2.2015 one building was sold to police officer ,by execution of sale deed by my friend. now he threaten my friend to get back the property for same amount. my friend refused. so the police officer threaten my friend to do suicide with his wife by writting a letter that my friend is responsible for his sucide. so my friend has filed a complanit in police station. but the head constable in police station after having communication with police , has threatened my friend to purchase back the property and withdraw the complaint on police friend. can my friend file complaint on head constable to his senior officerslike SP DSP, COMMISSIONER , DGP